Hi Dmitry,
IIUC you have two devices with identical IPv6 addresses, which we’ll call P and
Q, connected on two different interfaces. These interfaces are in different
VRFs so the addresses do not collide.
Now if we succeed in importing the discovered neighbours from VRF 0 to VRF 1,
these addresses will now collide. Put another way, if a packet arrives in VRF 1
destined to 2001::2 which device, P or Q, do you want to send it to?
Regards,
neale
From: <vpp-dev-boun...@lists.fd.io> on behalf of Dmitry Bufistov
<dmi...@midokura.com>
Date: Tuesday, 10 January 2017 at 15:39
To: vpp-dev <vpp-dev@lists.fd.io>
Subject: [vpp-dev] Get IPv6 neighbors MACs
Hi list,
I ended up with a weired VPP configuration:
there are two host interfaces in VPP: A and B. They both have identical MAC and
IP addresses. The IP address of B is on VRF 1.
Only interface A can get traffic from "real world", and it have one valid entry
in its neighbour table:
DBGvpp# sh ip6 neighbors
Time Address Flags Link layer
Interface
40.7989 2001::2 G 00:00:00:00:00:00 B
106.3092 2001::2 76:5c:87:1a:09:eb A
Now, from external application I would like to figure out the MACs of
neighbours of interface A and add corresponding neighbours for interface B.
Basically: copy neighbours table of A to the neighbours table of B. It should
be preferably done via java binding VPP API (JVPP).
VPP is good ad discovering neighbours so I believe there should be simple
solution for my problem. There is JVPP ipNeighborAddDel() call that adds
neighbour for given interface, but there is nothing I can find to query
neighbours.
Could please somebody point out if there is a simple way to achieve what I want?
Thank you a lot in advance for any help,
Dmitry
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